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Hi All:

___Given so many including those with brilliantly designed FCD's (Insight and HCH'er's) actually need a Scan Gauge for their daily tracking of not only fuel consumption but other even more interesting engine parameters, I thought it would be a great time to start a Scan Gauge HW and Support forum.

___Feel free to ask whatever question(s) you may have as well as add whatever info you have discovered while using the Scan Gauge I and/or II. I hope the CleanMPG community finds this forum extremely helpful and useful ...

___Good Luck

___Wayne

Hi All:

___I should have added that there are some very user friendly and very advanced enhancements still yet to come for Scan Gauge II owners/users in the not to distant future.

___As a prequel to an upcoming review, when you order your Scan Gauge II, it will arrive in a well packed and protected box and include the Scan Gauge II itself, a touch over 6’ of cabling and OBD-II connector, a 25 page Manual and Quick Start Guide, as well as some adhesive strips to secure your Scan Gauge to a location of your choosing. Within the 6’ of the OBD-Connector in your particular automobile anyway ;)

http://www.cleanmpg.com/photos/data/523/Scan_Gauge_II_-_Guide_Cabling_and_mounting_stickers.JPG
Scan Gauge II - The ball point pen and quarter were included to add perspective.

___Good Luck

___Wayne

I guess I'll be the first to ask a question. I purchased a Scanguage 2 a month or two ago and I have two different plugs on mine. I have the plug that the cable plugs into in the back and another that looks just like it on the right end. the only difference is that the one on the right is a different color; white I believe. The cable even fits into the other hole. What is it for? I didn't find any information on what it's for in the manual.

My SG may end up back in the Ranger. :eek:

Hi Larry:

___It is for the future data logging feature which is setup for a late August release. Believe me, you are going to start using that little feature more and more as time goes on with what Ron has planned ;)

___Psy, you have a SG-I right now IIRC. If that goes into the Ranger and your Civic gets the SG-II, you are going to love the new styling. Heads and shoulders above the first release although both have the same functionality at the moment. Don’t worry about the full functionality of SG-II just yet as there is a lot planned for the near and distant future …

___She sure is a pretty in any case :D

___Good Luck

___Wayne

Hi everyone,

I was wondering if anyone has any comments on the relative merits of the scangauge2 vs the supermid m1.

Dennis

I think the scanugauge2 has more features but is obdII based wheras the supermid taps into the ecu.

I don't have either so I'm not 100% the information is correct. But thats what I believe I heard

As far as I know, the superMID will only read-out in metric. That's great for the northern-most members but confusing for us yankee's.:D I do like the fact that the superMID can tell you how much of the trip that the ICE was off.

The northern-most members prefer L/100km. The SuperMID reads in km/L, which is preferred in Japan. A MPG version is in the works for early 2007.

i like how the supermid measures fuel with more than one decimal places!

i like how the supermid measures fuel with more than one decimal places!
Hello from Japan,

FYI, the SuperMID M-1 measures the injector width by 0.005 msec unit, which means that the 13,515 count becomes 1 cc or 67.575 msec accumulated width (222cc/min for 4 cylinder Toyota Prius).

Yoshi

Yosh, would you like to do a comparision on the pros and cons of supermid vs scangauge? Or if one exisists on the net somewhere can you post a link? I think a lot of people will like to know.

Here is a link I found. Not sure if it is official or not.

http://translate.google.com/translate?hl=en&sl=ja&u=http://priusdiy.fc2web.com/C-1.html&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Dsupermid%26hl%3Den%26lr%3D%26sa%3DG%26pwst%3D1

Hello tbaleno,

I have very little knowledge about the ScanGage.
I think krousdb is the right person to comment the comparison.

Edit:
Oh, you posted another comments...

I have three SperMID's.
model M-1 : mileage meter
model T-1 : tacho and water/intake-air temp
model C-1 : CAN message

Your link is for the Toyota Prius specific SuperMID C-1.
The M-1 page in Japanese is...
http://priusdiy.fc2web.com/NENPIKEI.html

I'm trying to make the English M-1 page in a few weeks.

Yoshi

Would you like to start a supermid thread to discuss the supermid so we don't take this thread off topic?

Are there other links for information on the supermid?

Would you like to start a supermid thread to discuss the supermid so we don't take this thread off topic?
We can see some thread at http://www.gassavers.org/
For example...
http://www.gassavers.org/showthread.php?t=1416&highlight=supermid

Matt Timion, who is the owner of gassavers.org, is going to conduct a group buy of the SuperMID M-1 from me.

(To Wayne, sorry for advertising another site, but it's tough for me to go round every site.)
Are there other links for information on the supermid?
Sure! There are a lot! :)

Do Google search as "supermid" keyword.
Please note that there are some SUPERMID tennis racket by Yonex or most of them are written in Japanese. :(

Yoshi

Yoshi. Don't worry about advertising other sites here. In fact, if you have threads over at gassavers that you update and don't want to double post then you can come here and just post a link to the gassavers threads.

Today I spoke to Ron at Scangauge and he stated the interface that plugs into the SG11 will not be available till possibly the end of September now. They ran into making adjustments with a bigger SD card (64mb ?). The extra cost for the interface should add ~ $99 to the SG11.

Also, the scangauge must convert metric to standard, but gives both. The conversion to standard is rounded off, so metric is more of a true reading.

From my understanding, they are trying to put updates to future changes to the SG11 on the internet so returns may not be required for updates.

One of the concerns that have been addressed from FEH owners is a way to have the ability to get battery levels. Ron said the hybrid owners are a target for sales because we like the techy instr. and readout gauges. He feels if it is information that is available from the OBD11 port, it's a matter of time that it will be available on the SG. His concern was the SG must be designed as a generic tool for all cars.

If you are interested in being notified when the interface will be available, go to http://scangauge.com/ and email that request. Ron said they put that request in a list to notifiy you as soon as it's available.

As always, it was a pleasure talking to Ron.

GaryG

Does Scan gauge provide any info on HV battery voltage, current and %SOC.
The 99NHW10 prius has ODFII connection, (codes are probaby similar to Classic, still checking)

Andrew

Hi Larry:

___It is for the future data logging feature which is setup for a late August release. Believe me, you are going to start using that little feature more and more as time goes on with what Ron has planned ;)

Actually, you can plug the ODBII connector to either port. I have mine plugged into the side port to cover the non-black part of it, which I thought looked silly.

I just order a Super MID for a friend yesterday for his 94 Geo. Yoshi did say,"They are still km/L version and the mpg version is not available within
> a few months."

Hi Brian:

___Back when the SG-II was still new, I thought I remember Ron saying he will data port via the second port. Both have the input capability so I assume it is two way for data logging via either as well.

___Good Luck

___Wayne

Hello all. I am a new hypermiler about 1 month old.

I have improved my mpg from 21 to 33 mpg in my 97 Nissan Maxima driving 500 miles on 14 gallons.

Anyways I just bought a Scan Gauge II and it is not consistent in my car I think its probally my car not the Scan Gauge. It consistently reads GPH and RPM but not MPG or MPH. For MPG and MPH it reads simply zero. But then all of a sudden it is reading again, then stops. Any suggestions?

Peter

Contact Dr. Scangauge. We had a Maxima a few years ago and it would do the same thing with the OBDII software on my laptop. I contacted the developer and he had me to switch ports settings of the software.(I think!)

From my understanding, they are trying to put updates to future changes to the SG11 on the internet so returns may not be required for updates.

One of the concerns that have been addressed from FEH owners is a way to have the ability to get battery levels. Ron said the hybrid owners are a target for sales because we like the techy instr. and readout gauges. He feels if it is information that is available from the OBD11 port, it's a matter of time that it will be available on the SG. His concern was the SG must be designed as a generic tool for all cars.

If you are interested in being notified when the interface will be available, go to http://scangauge.com/ and email that request. Ron said they put that request in a list to notifiy you as soon as it's available.

As always, it was a pleasure talking to Ron.

GaryG


Hey Gary,

Keeping in mind that I've only had SG for a week, any word or does anyone know how we'd take the update from the PC and put it on the Scangauge? Unless I missed it, there's no connection to just hook it in, is there?

Hey Pra,
I just purchased mine at the show as well. I asked Ron about the updates and he said it would have to be mailed in.

Hi,

I bought a Scangauge II when I was in the US thinking it will work in post 2000 Suzuki vehicles with OBD2 port.

According this chart the OBD2 protocol used by Suzuki is ISO 9141 in many of their sub 2L models

http://www.etools.org/files/public/generic-protocols-02-17-03.htm


I tried connecting to a 2003 Suzuki Wagon R 1.1L & 2005 Suzuki Baleno 1.6L. Even after forcing the ISO mode the unit switches off undetected after displaying the message "Connecting.........."


There also is a pin layout difference between Wagon R & Baleno in the DLC \ OBD2 Connector

http://scantool.imechatronics.com/obdii_female.png
from http://scantool.imechatronics.com/faq.htm

DLC pins used :-

Wagon R
Pin 5 -ve
Pin 7 digital signal
Pin 16 +ve

Baleno
Pin 5 -ve
Pin 9 digital signal
Pin 16 +ve


Does anybody know whether Scangauge supports ISO 9141 standard or is compatible with Suzuki ECU coding?

Regards
Joseph

Could anybody help forward my query to Mr. Ron \ Technical team of Scangauge II please?

Though the Suzuki has ODBII ISO 9141 standard it has only one digital
signal out -> K Line. It doesn't have K & L lines. Would this be the
problem?

I refered at http://www.elmelectronics.com/connect.html.

There is ELM 323 chip whose input can be modified to accept only K line.


My doubt is can the ELM 323 be used to modify the signals going to the Scangauge's RJ-45 jack by using a custom ODB II cable ?

Hi, I just got my Scangauge II today for my 2007 Honda Fit Manual Transmission and it rocks. I was hoping somebody could clarify a couple things for me:


How does the SGII calculate MPG? What is the formula? Obviously, it is Miles Driven divided by Gallons consumed but how does it determine the Gallons I am consuming?

What is the best metric to watch while accelerating so I can learn how to get the best FE when accelerating?

When I FAS I seem to lose all the current TRIP data, would setting it to HYBRID mode resolve this?

Which metrics are useful to follow? E.g. Engine Load (LOD), Ignition Timing (IGN), Throttle Position Setting (TPS), etc.


Thank You
-Menxit

Hi Menxit:

___About calc’ed FE, it appears to be based off of airflow and that is based off of the throttle plate opening possibly. No guarantees but it sure comes close sometimes ;)

___Your iFCD and aFCD in tandem. Watch one to a point and then perform the same over the next segment. If your aFCD rises, very well, if it falls, change your rate and range of acceleration over the same given distance to maximize a standard flat terrain profile. P&G is different then up to a steady state cruise so you want to be aware of that early on too.

___Yup, set your SG-II up for Hybrid mode in the gas type section and that will fix that.

___If you do not want to build the aFCD via X-Gauge, iFCD, LOD, 12V battery and Coolant temp until its over 150. Then swap to TPS is a good start. Trust me, when you have been SG-II equipped for a while, you will find exactly what you need and it will not take long.

___A Caveat. You really have to be careful with an SGII as you are more then likely concentrating on it instead of the road early on. This will go away in time but for now, be extremely careful as it can be highly distracting until just a glance is all you need in another two or three weeks once it becomes second nature.

___I hope that helped?

___Good Luck

___Wayne

First off, welcome to CleanMPG! I'll see what I can do to answer your questions.
1. Unfortunately, the SG doesn't actually use gallons consumed to calculate mpg. It calculates mpg by distance traveled and the air flowing through the engine. This is why it asks for the engine size.
2. I usually monitor TPS(throttle position sensor) when accelerating. Use the lowest number possible and still maintain acceleration.
3. Setting to HYBRID mode should solve that.
4. I like to monitor TPS and IMPG. I do this to see the effects of different throttle settings on FE. If you are going to do engine off coasting, monitoring the voltage(VLT) could be helpful in knowing when you may need to light up the engine if the voltage drops too far.

Hi Menxit:

___About calc’ed FE, it appears to be based off of airflow and that is based off of the throttle plate opening possibly. No guarantees but it sure comes close sometimes ;)

___Your iFCD and aFCD in tandem. Watch one to a point and then perform the same over the next segment. If your aFCD rises, very well, if it falls, change your rate and range of acceleration over the same given distance to maximize a standard flat terrain profile. P&G is different then up to a steady state cruise so you want to be aware of that early on too.

___Yup, set your SG-II up for Hybrid mode in the gas type section and that will fix that.

___If you do not want to build the aFCD via X-Gauge, iFCD, LOD, 12V battery and Coolant temp until its over 150. Then swap to TPS is a good start. Trust me, when you have been SG-II equipped for a while, you will find exactly what you need and it will not take long.

___A Caveat. You really have to be careful with an SGII as you are more then likely concentrating on it instead of the road early on. This will go away in time but for now, be extremely careful as it can be highly distracting until just a glance is all you need in another two or three weeks once it becomes second nature.

___I hope that helped?

___Good Luck

___Wayne
Great info, and as a new (2 days Scangauge owner, I can really attest to that last paragraph!! I find myself watching the Scangauge too much!! Glad to know that "this too shall pass"!!! :)

Hi, I just got my Scangauge II today for my 2007 Honda Fit Manual Transmission and it rocks. I was hoping somebody could clarify a couple things for me:


How does the SGII calculate MPG? What is the formula? Obviously, it is Miles Driven divided by Gallons consumed but how does it determine the Gallons I am consuming?

What is the best metric to watch while accelerating so I can learn how to get the best FE when accelerating?

When I FAS I seem to lose all the current TRIP data, would setting it to HYBRID mode resolve this?

Which metrics are useful to follow? E.g. Engine Load (LOD), Ignition Timing (IGN), Throttle Position Setting (TPS), etc.


Thank You
-Menxit

I've been trying to locate the port in my Fit Basic, I read that it's "under the steering wheel a little to the left", but I can't seem to find the port. Can you please describe where it's located?

Thx,
Shneor

Hi Shneor:

___If you have not found it yet, look up under the dash for a D-shaped female connector to match your SG-II’s male cable connector. They have a way of hiding themselves but its under either the driver or passenger side dash. I am not heading into see a Honda dealer to look at a Fit for a while so I cannot give you any more specifics. Hopefully a Fit owner will chime in soon.

___Good Luck

___Wayne

I've been trying to locate the port in my Fit Basic, I read that it's "under the steering wheel a little to the left", but I can't seem to find the port.


Snheor, I had to open the door, kneel down & look under the dash to find the port in my car the first time. I'm not sure what model Honda is in this photo, but the port is in a similar location in my car.

http://www.modifry.com/freebies/old/dtc/dlc_close.JPG

I hope this helps and I hope I linked the photo correctly. :)

Possibly the world's worst picture (http://www.fitfreak.net/forums/fit-inside/8262-will-scangauge-ii-work-usdm-fits-4.html#post140144) of a FIT "DLC" (What Honda calls the OBD-II connector.)

"Just below the dash at the driver's right, above the throttle pedal."

I think I remember seeing the "DLC" with arrow in my Sister-in-Law's Fit.


Anyhow, these pictures are NOT a FIT, but they are in focus. The DLC in a Honda Civic. (The DLC in the Honda Fit looks just the same.)

http://i60.photobucket.com/albums/h10/mrbill05/scangaugeii-1.png
http://i60.photobucket.com/albums/h10/mrbill05/DLC.png

(And yes, the crack is fixed.)

-mr. bill

Hey, Bill -- what is that cylinder under the dash? :confused:

Just the steering wheel joint cover, together with a lovely steering column caution label:

And Saint Service deManual sayeth "First, thou shall take out thy steering knuckle connecting bolts. BUT, a priori, thou shall taketh off thy steering wheel to prevent real reel damage. Fear not, for thy will not be left without direction. But postponeth thy travel at this time, else thou mayeth lose control. BUT, a priori a priori, thou shall disableth thy Holy Restraint with thy Tablet and counteth to three, no less! Three shalt be the number thou shalt count, and the number of the counting shalt be three. Four shalt thou not count, for it shall be a waste, nor either count thou two, excepting that thou then proceed to three. Five is right out. Failure to counteth to three, and thy Holy Restraint mayeth be unrestrained, and thou might snuff it."

-mr. bill

LOL! :p

Thanks, Bill! :thumbs_up:

Thank you all for the replies. I have not located the port yet, but now I know wjat to look for it will be easier to fine.

hmmm. I hope the port in my 08 Prius is easier to find!

hmmm. I hope the port in my 08 Prius is easier to find!

It's directly above your right leg as you drive--just forward of the moulding. You can easily reach it with your hand while seated.

Well I just received my SG2 plugged it into my 2005 Hyundai elantra gt. The display powered up and said connecting. Started the vehicle and the SG2 smoked. The display still works and says connecting but will not connect with any of the different modes. I tested it on a 2007 Toyota corolla and it displays the same thing just connecting. I beleive it is fried since you can smell burnt electronics from it. I have sent a email to linear logics customer support early on Fri 5/23/08 but havent heard back yet as I expected( Holiday Weekend and all). I will keep this thread updated on what happens next.

I did find one other person with a elantra gt via google that had same issue and this product might not be compatible with the vehicle.

I would still like to use the SG2 with my wifes vehicle a 2003 KIA Optima but as the sg2 does not work and both vehicles have the same parent company and I am afraid that the same result would happen with the SG2.

Plus her car is being assessed for total loss damage or fixible as she was hit by a DrunK Driver the other night.

Jeff (Pleo)

I've got a 99 Elantra and an 06 Sedona. Right_Lane_Cruiser has a 02 Elantra. I've not had any issues in my vehicles, and neither did the 02. I suspect your unit just had a bad trace.

Cool that will keep my hopes up.

I was really bummed with the smell of burnt electronics and not being able to use the SG2.

Hello everyone, hopefully somebody here can help me out.
I've been playing around with the fuel cutoff settings in my SGII. My idle throttle position is 11 so I set it to 12....then 13.....then back to
default of 24. With each setting my LHK (litres per 100 km) shows 9999 when I'm idling at a stop light (in gear or in neutral).
However, when I'm in gear & I let off the gas, DFCO kicks in and it displays "open LP" and 0 LHK as it should correct? So what's up with
the "9999"? This is going to screw up my overall average. Any ideas?

Thanks in advance!
Izzy

Hi Izzy:

___While idling at a stop light, you should see 9999 L/km because you are not moving but still using fuel. Divide by 0 comes to play. It will not mess up your average FE because it is still measuring < .1 L/hr while idling and that is where the calc comes from, not mpg while not moving. From the sounds of it, everything is working exactly as it should so make sure you do not up the fuel cutoff to high or the SG-II will never calculate when or if it occurs.

___Good Luck

___Wayne

Hi Wayne, thanks for replying.
I'm still trying to wrap my brain around this. I normally average about 5.4 LHK so how could 9999 LHK at idle be correct??
I've read some other posts with users that have their display set up as MPG getting 9999 but this would be an advantage...
higher MPG = higher overall average.
Also, when they are in DFCO the display shows 9999 MPG. This makes sense to me.
Maybe I'll switch my display from km & litres to miles & gallons & see what happens.

Izzy

Hi Izzy:

___Let me try and put it another way … At idle while not moving, you are going nowhere but still consuming fuel. If you were to continue to go nowhere, your car could burn an infinite amount of fuel and you would register no distance traveled. Thus the 9999 L/100 km readout. In fact, it would be an infinity L/100 km but the Scan Gauge cannot display infinity ;) 9999L/100 km is the same as 0 mpg.

___If you are using the English display units, Fuel cut will show 9999 mpg. In metric, it will show 0 L/100 km.

___Good Luck

___Wayne

Hi Izzy, try thinking of it like this: When you are idling but not moving, what is your instantaneous L/100km (ie, how many litres will it take to go 100km at your current speed of 0?). The answer is infinity litres. The ScanGauge can't show infinity, so it just shows the highest number that can be shown on its display, which is 9999.

When in mpg mode, you will see something really high like 9999mpg when in dfco and 0mpg when at a stop idling. L/100km and mpg are somewhat inverses of each other: One is amount of fuel per unit of distance, and the other is unit of distance per amount of fuel. So large numbers in one (like 9999) will correspond to small numbers in the other (such as 0).

edit: looks like Wayne beat me to it!

I just thought a lower number would make more sense. I know some fuel is
being used to idle but why wouldn't 0 L/100 km (at idle) work the same way?
(sorry if I'm dragging this topic on!)
I appreciate everyone's help with this...I've learned so much on this website!!
Thanks again!!

Hi Izzy:

___Just the way it is. If you are not moving but consuming fuel (no matter how small), you are consuming an infinite L/100 km traveled. What I would suggest is that for some of your driving you shut down at lights (setup your ScanGauge for Hybrid mode first) and than you will experience 0 gallons or Liters consumed while sitting there waiting for the light to change.

___Good Luck and feel free to ask questions as you are helping more than just yourself when answers are posted.

___Wayne

What is Scan Gauge exactly? What does it do? Does it get you better MPG and/or better fuel efficiency?? What is the difference between I & 2??? What all parts of car do you have to access to install it?? How come I've never heard of it b4?

LOL!! Let me try to address your questions one by one.


The ScanGauge is a device which displays info from your ECU (Engine Control Unit)
It talks to the ECU in your car to obtain information about how it is running -- just like your speedometer, odometer, fuel gauge, and water temperature gauges already built into the car.
It helps you get better mileage by showing you the effects of what you do in real time. Among other things, it can show you the moment by moment instantaneous FE and the average FE for a user defined trip. By paying attention to this info you can fine tune your techniques and improve your fuel economy. The device itself doesn't modify anything in your car.
Version 1 is larger and not as polished looking. It also does not have the user defined gauges and ability to detect fuel cut that Version 2 does.
You only need access to the underside of your dash for this to be hooked up. It has a large plug that looks much like an old fashioned joystick cable and it plugs into the diagnostic port of your car. No special tools are needed. Once connected, you can even read trouble codes (check engine lights!) and clear them.
Most people haven't heard of it because they've never looked for anything like it before. ;)

I hope that covers everything for you!

Welcome to CleanMPG!!!

Just got my new SG-II.

My MPG usually sits at 9999 but occasionally will display numbers between 2000 and 5000.

I tried resetting about 4 times now to no avail.

Anybody know what I'm doing wrong?

I did the sequence..HOME>MORE>FILLUP>DONE

But when I go back to see the display.... MORE>FILLUP....it displays 0 gallons.

The other displays such as RPM, MPH work fine.

I have a 1999 Sonata.

If anyone wants to call me. I would appreciate that to. 562 826 9295

Don

Update.

After trouble shooting with Wayne, he zeroed in on the problem.

Apparently Hyundai did not follow the proper protocols when they installed the OBDII plug in the 1999 Sonatas. This is the second time that Wayne has encountered this, the first time was also a 19999 Sonata.

What happens is when the SG is plugged in, the speedometer is disabled always registering zero MPH. The SG always displays 9999 MPH.

Unfortunately my 1999 Sonata is one of the few cars that can not use a SG. :(

I'm seeing a strange problem with my SG-II I bought last month. The "TODAY" trip MPG is too low. For example, drove to Chiro this morning about 10 miles the CURRENT showed about 28 MPG. 20 minute appt, drive a mile and see CURRENT at 30+ MPG. Switch over to TODAY and it's at 24 MPG!?! Get to work, 20 miles, CURRENT @ 31 MPG. About 9 hours later driving home, after a few miles CURRENT shows 28 MPG and TODAY shows 20!?!

Anyone have a clue what might be happening?

i recently purchased a sg2 via the group buy. it hasn't arrived yet, but when it does, besides ign, what else should i monitor in my hch2, and is there anything special i should know about using it in this car? tia.

I'm seeing a strange problem with my SG-II I bought last month. The "TODAY" trip MPG is too low. For example, drove to Chiro this morning about 10 miles the CURRENT showed about 28 MPG. 20 minute appt, drive a mile and see CURRENT at 30+ MPG. Switch over to TODAY and it's at 24 MPG!?! Get to work, 20 miles, CURRENT @ 31 MPG. About 9 hours later driving home, after a few miles CURRENT shows 28 MPG and TODAY shows 20!?!

Anyone have a clue what might be happening?

I know what's happening now but I don't know why. When I turn off the car (2000 Audi S4) the display stays on and whatever state instant MPG is at the SG continues to calculate MPG as if the car is running. Usually, when I stop, the instant MPG is low so it's dragging down the trip averages.

Thanks for any help.

I know what's happening now but I don't know why. When I turn off the car (2000 Audi S4) the display stays on and whatever state instant MPG is at the SG continues to calculate MPG as if the car is running. Usually, when I stop, the instant MPG is low so it's dragging down the trip averages.

Thanks for any help.

It finally dawned on me today. I fixed the problem when I disabled hybrid mode.

Hi,
I'm new to the whole scangauge and just tried it in my 2003 Prius after having it in my Tundra for a few weeks. No problem with the Tundra, but the Prius was a nightmare! When I plugged it in the display shoed the triangle of death for a while and then fixed itself. What didn't was the ABS system. The ABS light flashed constantly and the brake power shut down. I had brakes but with now power! I'm sure I did something wrong. When I unplugged the scan gauge, shut the car off, and restarted all was well again. What did I do?
McLGolf

Update.

After trouble shooting with Wayne, he zeroed in on the problem.

Apparently Hyundai did not follow the proper protocols when they installed the OBDII plug in the 1999 Sonatas. This is the second time that Wayne has encountered this, the first time was also a 19999 Sonata.

What happens is when the SG is plugged in, the speedometer is disabled always registering zero MPH. The SG always displays 9999 MPH.

Unfortunately my 1999 Sonata is one of the few cars that can not use a SG. :(

For the record, my friend's 2005 Hyundai Elantra actually blew out my Scangauge type 1.
Linear Logic was kind enough to repair it for me, although due to parts issues they wound up just giving me an SG II.

McGolf, don't plug it in with the Prius booted up. We just had a discussion of this exact issue (minus the ABS thing?) within the last week.

Sean,
Thanks for the info. I think if I would just follow the manual things would work right. I started the car and then plugged the gauge in and everything worked fine.
McLGolf

Good to hear! It shouldn't be a problem as long as you only plug or unplug it with the car off.

I'll be ordering my SGII early next week for my '09 FEH. I've read something about 'just make sure you program it for your particular vehicle'....is there anything special I need to know about it referece my '09 FEH before I get it, or is RTFM the order of the day?

Thanks!!

They're talking about putting in engine size, fuel tank size, fuel, and hybrid/not-hybrid.

McGolf, don't plug it in with the Prius booted up. We just had a discussion of this exact issue (minus the ABS thing?) within the last week.

Sean,
Thanks for the info. I think if I would just follow the manual things would work right. I started the car and then plugged the gauge in and everything worked fine.
McLGolf

Good to hear! It shouldn't be a problem as long as you only plug or unplug it with the car off.

I am confused by this discussion. Sean, you advise not to plug it in with the Prius booted up, then McGoff says he followed the manual by starting the car and plugging the scan gauge in. You then say good, only plug or unplug it with the car off. What am I missing?

I have a scangauge, currently using it on my Scion tC. I will get my 2010 Prius in 10 days and plan on using it on the Prius. Now I am confused when to plug in the Scangauge. Doesn't the Scangauge manual say to plug it in after starting the engine which in the Prius means putting it in ready mode?

Hm. I see that page 2 of the manual does indicate plugging in the SG after starting the engine but I've always plugged it in with everything off. (The good statement was because he had everything working.)

The reason I suggest not playing with the plug while the Prius is on can be seen in the thread below:

Odd behavior today... (http://www.cleanmpg.com/forums/showthread.php?t=24154)

Discussion of plugging and unplugging the SG in the Prius begins in post #9 of that thread.